Keithhjs
Aquarium Advice Addict
I have some large pieces of old coral I had in a tank about 10 years ago. They are nice for aquascaping but have old coraline algae dried on them and when you move it it does drop little pieces of dust and coral. Is this safe to put in an established tank? Should I soak it for an extended time, or wash with vinegar, etc? Any helpful hints are appreciated.